The graph shows Peta's heart rate, in beats per minute, during the first 60 minutes of a marathon - HSC - SSCE Mathematics Standard - Question 16 - 2023 - Paper 1
Question 16
The graph shows Peta's heart rate, in beats per minute, during the first 60 minutes of a marathon.
(a) What was Peta's heart rate 20 minutes after she started her m... show full transcript
Worked Solution & Example Answer:The graph shows Peta's heart rate, in beats per minute, during the first 60 minutes of a marathon - HSC - SSCE Mathematics Standard - Question 16 - 2023 - Paper 1
Step 1
What was Peta's heart rate 20 minutes after she started her marathon?
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Answer
From the graph, at 20 minutes, Peta’s heart rate is approximately 120 beats per minute (bpm).
Step 2
At what time would her heart rate first reach 140 beats/minute?
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Answer
Looking at the graph, Peta's heart rate first reaches 140 bpm at 30 minutes. Since she started at 10 am, this means her heart rate first reached 140 bpm at 10:30 am.
